Hi, and thanks for your medical question on eHealth forum!
If your girlfriend has an average cycle of 28 days then sex on 4th and 5th day is pretty safe and unlikely to cause pregnancy. Signs and symptoms of pregnancy can start about 4-5 days before the period is missed but are most prominent in the weeks following the missed periods. Hope this helps. Take care!
"Ask a Doctor" questions are answered by certified physicians and other medical professionals.
For more information about experts participating in the "Ask a Doctor" Network, please visit our
medical experts page.
You may also visit our Early Pregnancy Signs and Symptoms , for moderated patient to patient support and information.
The information provided on eHealth Forum is designed to improve, not replace, the relationship between a patient and his/her own physician.
Personal consultation(s) with a qualified medical professional is the proper means for diagnosing any medical condition.